Reliability and validity of knee-ankle isometric strength measurement and rehabilitation training evalua-tion system
10.3969/j.issn.1001-1242.2025.05.011
- VernacularTitle:膝踝等长测力及康复训练评估系统的信效度研究
- Author:
Yanming GAN
1
;
Mingqiang SHI
;
Qiaofeng GUO
Author Information
1. 北京体育大学,运动人体科学学院,北京市,100084
- Publication Type:Journal Article
- Keywords:
lower limb;
isometric strength assessment;
dynamometer;
reliability;
validity
- From:
Chinese Journal of Rehabilitation Medicine
2025;40(5):720-725
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To investigate the reliability and validity of the knee-ankle isometric strength measurement and reha-bilitation training evaluation system for measuring lower limb muscle strength.Method:The same tester used the above-mentioned system to perform two maximum isometric muscle strength tests on 40 college students at an interval of one week.The intraclass correlation coefficient(ICC),standard error of measurement(SEM)and minimum true change(MDC)were calculated to evaluate the reli-ability.Pearson correlation analysis and paired sample t test were used to evaluate the validity of the test re-sults and the external load criterion data.Result:The ICC of test-retest were 0.97-0.99(P<0.01),SEM were 1.74-11.09Nm,SEM%were 6.05%—13.78%,MDC were 4.82-30.73 Nm,MDC%were 16.76%—38.20%.The test results were highly positively correlated with the external load criterion data(r=0.99-1.00,P<0.01),and there was no significant differ-ence(P>0.05).Conclusion:The knee-ankle isometric strength measurement and rehabilitation training evaluation system has good reliability and validity,and can conveniently and effectively measure the multi-angle knee and ankle mus-cle strength and display it in real time.
